CVE 2008-1974
Cross-site scripting (XSS) vulnerability in addevent.php in Horde Kronolith 2.1.7, Groupware Webmail Edition 1.0.6, and Groupware 1.0.5 allows remote attackers to inject arbitrary web script or HTML via the url parameter.
See the 
CVE page on Mitre.org
for more details.
